回复：the subjects were moving and my shutter speed was slow 100

as to 15 meter distance, f2.8 can give a good depth of field.
as to 100 ms, should able to freeze a girl movement, a model give people a 0.5s to 1s time to catch a pic.
just for curious, how do you choose your focus point ? and how are you sure you focus well ?

所有跟帖： 

• 我用自动对焦，一般选中间点为对焦点。 -卡通她爸爸- ♂ (0 bytes) () 02/05/2006 postreply 12:05:39

• how do you do metering your subject? -spooky- ♂ (127 bytes) () 02/05/2006 postreply 14:44:17

• 我用光圈优先， -卡通她爸爸- ♂ (14 bytes) () 02/05/2006 postreply 17:55:38

• Canon gives you 3 differnt metering models -spooky- ♂ (238 bytes) () 02/05/2006 postreply 18:12:03

• 多谢，怎么操作spot metering啊？ -卡通她爸爸- ♂ (16 bytes) () 02/05/2006 postreply 19:06:10

• 多谢多谢！明白怎么操作了，看了说明书 -卡通她爸爸- ♂ (56 bytes) () 02/05/2006 postreply 19:22:38

• 其实脸部有的曝光过度了 -卡通她爸爸- ♂ (100 bytes) () 02/06/2006 postreply 16:25:07